The shift of light toward longer wavelengths due to cosmic expansion, used to measure distances and velocities.
Galaxy redshift is the foundational observation that revealed the universe is expanding. This article traces how stretched light from distant galaxies became the cornerstone of modern cosmology, from Edwin Hubble’s discovery to the detailed cosmic timeline of the Lambda-CDM model.
Cosmological redshift is the stretching of light to longer wavelengths as the universe expands. This phenomenon underpins our understanding of cosmic history, from the Big Bang to the formation of galaxies, and is a cornerstone of modern cosmology.
Redshift is the stretching of light from distant galaxies, revealing the expansion of the universe and the history of cosmic evolution from the Big Bang to the present day. This interactive guide explores the epochs, evidence, and missions that define our understanding of the cosmos.
